GM Service Manual Online
For 1990-2009 cars only

No Torque Converter Clutch (TCC) Apply

Checks

Causes

Lock-up solenoid

Refer to Diagnostic System Check - Vehicle.

Engine speed sensor

Refer to Diagnostic System Check - Vehicle.

ATF temperature sensor

Refer to Diagnostic System Check - Vehicle.

Vehicle speed sensor

Refer to Diagnostic System Check - Vehicle.

Turbine sensor

Refer ti Diagnostic System Check - Vehicle.

Shift switch

Refer to Diagnostic System Check - Vehicle.

Transmission control module (TCM)

Refer to Diagnostic System Check - Vehicle.

Control valve spool

Control valve spool error

Torque converter

Internal failure